Girotti, P. (2024) The measurement of muon g−2 at Fermilab. Il nuovo cimento C, 47 (1). pp. 1-8. ISSN 1826-9885
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Abstract
The Muon g −2 Experiment at Fermilab (E989) was built to repeat and improve the previous E821 Experiment at Brookhaven National Laboratory (BNL), aiming to reduce the experimental error by a factor of 4 to the final accuracy of 140 parts per billion (ppb). On April 7th, 2021, the E989 collaboration published the first result based on the first year of data taking (Run-1), measuring aμ = 0.001 165 920 40(54) with a precision of 460 ppb. The measured value is consistent with the BNL measurement and strengthens the long-standing tension with the data-driven SM prediction to a combined discrepancy of 4.2σ. On the theory side, however, new efforts involving lattice-QCD techniques are starting to question the current consensus on the theoretical prediction, demanding new improvements on both the experimental and theoretical sides. The Muon g−2 Experiment at Fermilab has now concluded its sixth and final year of data taking, and a new result based on the Run-2 and Run-3 data was published in August 2023. This paper briefly describes the Muon g − 2 Experiment at Fermilab and its current status.
| Item Type: | Article |
|---|---|
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 11 Dec 2023 02:57 |
| Last Modified: | 11 Dec 2023 02:57 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/22549 |
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